[Anatomy & Physiology] Nervous System

Self-explanatory

What are neurons?

Cells that rely on electricity and chemicals to communicate with other cells

What are nerves?

Bundles of neurons

Identify this part of the neuron and its function:

• Dendrite

• Receives signals from other neuron cells

Identify this part of the neuron and its function:

• Nucleus

• Contains the cell's genetic material

Identify this part of the neuron and its function:

• Axon

• Transmits electrical impulses along the cell

Identify this part of the neuron and its function:

• Myelin Sheath

• Insulates the axon to protect it and speed up signal transmission

Identify this part of the neuron and its function:

• Axon Terminal

• Transmits the electrical signal to other cells

What are the cranial nerves and how many of them are there?

• Nerves in the brain and brain stem that control senses and motor functions.

• There are twelve.

I

• Olfactory nerve

• Smell

II

• Optic nerve

• Vision

III

• Oculomotor nerve

• Eye movement/pupil dilation

IV

• Trochlear nerve

• Eye movement

V

• Trigeminal nerve

• Chewing

VI

• Abducens nerve

• Eye movement

VII

• Facial nerve

• Facial expressions

VIII

• Vestibulocochlear nerve

• Hearing

IX

• Glossopharyngeal nerve

• Taste and swallowing

X

• Vagus nerve

• Heart rate, digestion, and speech

XI

• Accessory nerve

• Neck movement

XII

• Hypoglossal nerve

• Tongue movement